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  • 1985-1989  (14)
  • 1955-1959  (6)
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of natural products 50 (1987), S. 317-321 
    ISSN: 1520-6025
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Development genes and evolution 196 (1987), S. 473-485 
    ISSN: 1432-041X
    Keywords: Drosophila melanogaster ; Proliferation ; Neuroblasts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The pattern of neuroblast divisions was studied in thoracic and abdominal neuromeres of wild-type Drosophila melanogaster embryos stained with a monoclonal antibody directed against a chromatin-associated antigen. Since fixed material was used, our conclusions are based upon the statistical evaluation of a large number of accurately staged embryos, covering the stages between the formation of the cephalic furrow up to shortened germ band. Our observations point to a rather stereotypic pattern of proliferation, consisting of several parasynchronous cycles of division. The data suggest that all SI neuroblasts divide at least eight times, all SII neuroblasts six or seven times and all SIII neuroblasts at least five times. This conclusion is based on the mapping of mitotic neuroblasts and is supported by the progressive reduction of the neuroblast volume and by the results of cell countings performed on embryos of increasing age. No conclusive evidence was obtained concerning the fate of the neuroblasts after their last mitosis, i.e. it cannot be decided whether the neuroblasts degenerate or become incorporated as inconspicuous cells in the larval ventral cord. The duration of the cycles of division of the neuroblasts was found to be 40–50 min each, while in the case of ganglion mother cells about 100 min are required to complete one cell cycle.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 73 (1986), S. 553-555 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied climatology 10 (1959), S. 164-164 
    ISSN: 1434-4483
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied climatology 9 (1958), S. 360-412 
    ISSN: 1434-4483
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Summary The temperature series of Basle hitherto studied back until 1826 has been extended to 1755 by means of the observations ofJ. J. d'Annone. The whole series is now reduced to the present position of the meteorological station at St. Margarethen near Basle, whereby also the increasing town effects have been taken into account. Methods for the reductions have been developed which enable a numerical analysis of the different sources of error. A comparison with other secular series leads to the conclusion that this Basle series of 1755–1957 represents a valuable completion of the hitherto existing Central European material, since it completes e. g. the triangle De Bilt—Berlin—Vienna used byF. Baur, to a quadrangle.
    Abstract: Résumé La série bâloise d'observations de température précédemment établie depuis 1826 a été prolongée en arrière jusqu'à l'année 1755 à l'aide des observations deJ. J. d'Annone. La série complète est maintenant réduite à l'atitude de la station actuelle de St. Margarethen, compte tenu de l'effet croissant de l'agglomération urbaine. Ces réductions furent faites par des méthodes permettant d'éliminer au mieux les différentes causes d'erreur. La série bâloise de température de 1755–1957 constitue dès lors un précieux document venant s'ajouter aux séries existantes de l'Europe centrale; elle fait, par exemple, du triangle De Bilt—Berlin—Vienne utilisé parF. Baur un quadrilatère de stations de base.
    Notes: Zusammenfassung Die Basler Temperaturreihe, bisher bis 1826 bearbeitet, wird mit Hilfe der Beobachtungen vonJ. J. d'Annone bis zum Jahre 1755 rückwärts erweitert. Dabei wird die ganze Reihe auf den jetzigen Standort der meteorologischen Station auf St. Margarethen reduziert, wobei auch der zunehmende Stadteinfluß berücksichtigt ist. Für die Reduktionen wurden Methoden entwickelt, die eine zahlenmäßige Erfassung der verschiedenen Fehlerquellen ermöglichen. Wie auch ein Vergleich mit anderen langjährigen Reihen zeigt, bildet diese Basler Reihe 1755 bis 1957 eine wertvolle Erweiterung der bisherigen mitteleuropäischen Reihen, indem sie z. B. das vonF. Baur benutzte Dreieck De Bilt—Berlin—Wien zu einem Viereck ergänzt.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Ocean dynamics 39 (1986), S. 217-223 
    ISSN: 1616-7228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 7
    Publication Date: 1987-12-01
    Print ISSN: 0949-944X
    Electronic ISSN: 1432-041X
    Topics: Biology
    Published by Springer
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  • 8
    Publication Date: 1987-09-01
    Description: The leaf terpene composition of 645 individual lodgepole pine trees and 79 bulked samples from 111 different sites or provenances and from one putative and three western jack pine populations (10 trees each) were analyzed by gas chromatography. Numerical analysis by a centroid cluster analysis of the mean squared Euclidean distances was carried out, and percentile distributions of the individual terpenes were plotted. The data obtained confirmed the previous subdivision into the major terpene pattern types A, B, and C (or H) and five subgroups (based on the high modes in bimodal distributions); four additional subgroups were added. Except for typical coastal populations, inter- and intra-populational terpene pattern variation was high. Centroid clustering and assignment of terpene types and subgroups lead to some distinct geographical groupings. Coastal populations (ssp. contorta) were found to be rather unifornm and only a minor difference appears to exist between northern and southern populations. Those near Haines, Alaska, the Skeena Valley, southeastern Vancouver Island, and the Puget Sound showed intermediacy with interior (ssp. latifolia) stands. The Fort Bragg (ssp. bolanderi) and Samoa populations from northern coastal California contained many trees with unique terpene patterns. The interior populations (ssp. latifolia) were highly variable and inverse frequencies of the type A (high near the coast) and type B (high in and near the Rocky Mountains) were recorded in several west-east transects. Introgression with jack pine, as measured by the frequency of type C/H patterns, was extensive in northeastern Alberta and the Peace River area of British Columbia. However, some difficulty in describing recent introgression was encountered. A unique (possibly archaic) population was encountered at Petitot River. The ssp. murrayana from the southern Cascades of Oregon and northern California could not be distinguished from ssp. latifolia further north by the terpenoid data.
    Print ISSN: 0045-5067
    Electronic ISSN: 1208-6037
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 9
    Publication Date: 1989-07-01
    Description: The leaf oil terpene composition of mountain hemlock (sugamertensiana (Bong) Carr.) from eight central–coastal, three interior, and three southern populations was determined. High intra- but low inter-population variation was found. No significant elevational differences were recorded. Most trees from the southern populations had lower car-3-ene and higher α-pinene and β-phellandrene percentages than those from northern locations. Interior populations did not differ extensively from coastal populations. Owing to the high tree-to-tree variability, putative hybridization of mountain hemlock with western hemlock would be difficult to detect by leaf oil terpene analysis.
    Print ISSN: 0045-5067
    Electronic ISSN: 1208-6037
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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  • 10
    Publication Date: 1985-10-01
    Description: The leaf oil terpene composition of lodgepole pine stands from contrasting moisture regimes (400–1200 mm precipitation) within upland and bog sites in the Prince George area of central British Columbia was investigated. In addition to the terpene patterns recorded previously, a new one with relatively high percentages (5–28%) of the terpinene group was found. This pattern was encountered mainly in old trees with very low yields (less than 0.1%) of volatile oil, especially in trees from shaded stands. The absence of resin canals in the leaves of such trees may be the reason for the low yields, but the reason for the link with relatively high terpinene group percentages is obscure. Young trees growing in the vicinity of such stands had mainly the normal patterns. No differences between upland and bog sites or dry and wet sites were found in young trees. Hence, old trees from bogs or wet sites east of Prince George provided progeny with the normal terpene patterns, even though many of the old trees have the new terpene pattern. Samples from two 12- to 13-year-old provenance trials originating from west and east of Prince George had terpene patterns similar to those of the young trees from the natural stands.
    Print ISSN: 0045-5067
    Electronic ISSN: 1208-6037
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
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